Full Stack / Mobile

OQB

A secure mobile-first examination workflow with analytics, review tools, and candidate monitoring.

Private or internal project.

Overview

OQB is a secure mobile-first examination platform engineered to handle reliable test delivery, instantaneous performance feedback, and robust candidate state tracking.

Collaborated across frontend mobile surfaces and backend services to construct resilient state workflows, preventing data loss during unpredictable testing environments.

Tech Stack

Mobile

React Native

Expo Router

Backend

FastAPI

REST APIs

JWT Authentication

Data

MySQL

Relational Architecture

Features

+ Secure stateful test attempts

+ Interactive bookmarking and quick-review navigation flow

+ Real-time candidate result analytics and breakdown dashboards

+ Proctoring telemetry and background tab-switch monitoring

+ Highly responsive exam layouts tuned for focus

Architecture

Candidate Client (Mobile)

React Native Context Layer

FastAPI Secure Gateway

MySQL Relational Store

Analytics & Monitoring Pipeline

Challenges

High-stakes exam screens must maintain flawless user state and data integrity across network drops without confusing the student.

Designed an API-driven offline/online synchronized attempt tracker using localized state layers to keep submission steps fully predictable.

Constructed isolated review flows that eliminated ambiguous client-side states during complex multi-tier question layouts.

Lessons Learned

Production-level mobile design patterns for high-reliability workflows
State preservation architecture under strict connectivity constraints
Enterprise REST API integration within corporate security frameworks